/*
 * Copyright 2018 StreamSets Inc.
 *
 * Licensed under the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.streamsets.pipeline.lib.crypto;

import com.amazonaws.encryptionsdk.CryptoResult;
import com.streamsets.pipeline.api.ConfigIssue;
import com.streamsets.pipeline.api.Stage;

import java.util.Collections;
import java.util.List;
import java.util.Map;

@FunctionalInterface
public interface EncryptionProvider {
  default List<ConfigIssue> init(Stage.Context context) {
    return Collections.emptyList();
  }

  /**
   * Performs encryption or decryption using this provider.
   *
   * @param in data to be enciphered/deciphered
   * @param context Additional encryption context (AAD) values.
   * @return enciphered or deciphered data
   */
  CryptoResult<byte[], ?> process(byte[] in, Map<String, String> context);
}
